package cn.tedu._04interceptor.base.interceptors;

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Slf4j
public class MyInterceptor implements HandlerInterceptor {

    
    /**
     * 1.拦截请求：可以实现权限校验、限流访问...
     * @param request
     * @param response
     * @param handler
     * @return  true代表放行，false代表过滤
     * @throws Exception
     */

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        log.debug("1.perHandle方法执行");
        return true;
    }

    /**
     * 2.拦截响应：完成响应属性修改、敏感词过滤等
     * @param request
     * @param response
     * @param handler
     * @param modelAndView
     * @throws Exception
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
      log.debug("2.postHandle方法执行");
    }

    /**
     * 3.拦截最终响应
     * @param request
     * @param response
     * @param handler
     * @param ex
     * @throws Exception
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
      log.debug("3.afterCompletion方法执行");
    }
}
